OK, I'm doing a T2 swap into my NA. The motorset/ecu/harness/etc is coming from a S4 TurboII. The car it's going into is a S5 GXL. Now here's where I need some help. I'm using the S4 TurboII sensors, harness, and ECU, but the dash (in-car) harness is different from the S4 ECU. I'm NOT going stand-alone, and I'm NOT swapping everything to S5. I need to know the pinouts for both of these ECU's so i can repin my dash (in-car) harness to have the S4 ECU connector on it so I can plug it right into the S4 ECU. Please either help me find the pinout diagrams or help me find another way to do this. You can get in touch with me here, or via AIM at driftedfc3s. Thanks.

 

I thought the only thing the engine harness has goes directly to the ecu??? and you would leave the main wiring harness s5 and everything should hook up??? I've never done this swap before but I've looked pretty closely at the engine harness and it all just goes right back to the ecu nothing in the dash???

 

i basically need to repin my in-car harness into the S4 in-car harness connector.

 

Why people insist on doing things the hard way is beyond me. s5 owners should use s5 electronics, s4 owners should use s4 electronics. Instead we have s4 owners using s5 parts and s5 owners using s4 parts. Yes, this is a pet peeve of mine. It turns a few hours of light plug and play work into a few days of tedious wiring diagram work. All for what?

I know that's not what you wanted to hear and it doesnt help you any, but I just don't comprehend it. As far as your question, I have no answer, because I don't, and won't, perform such a swap across series.

 

Ah sort of... you would need to change connectors too... I agree with Kevin... this kind of swap will be days and days of re-wiring.

heck you would have been better off using the S5 non turbo harness and modifing that to work, than trying to make a S4 Turbo harness work.

Or swapping the interior and front harnesses with S4 ones as well.

 

use the NA series 5 wiring harness

 

wait, if i use my S5 NA engine harness, which ECU would i use?

Icemark, please contact me on AIM at driftedfc3s. I will be on for a little bit longer.